1 /* 2 * QEMU Generic PCI Express Bridge Emulation 3 * 4 * Copyright (C) 2015 Alexander Graf <agraf@suse.de> 5 * 6 * Code loosely based on q35.c. 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a copy 9 * of this software and associated documentation files (the "Software"), to deal 10 * in the Software without restriction, including without limitation the rights 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 * copies of the Software, and to permit persons to whom the Software is 13 * furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included in 16 * all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 * THE SOFTWARE. 25 * 26 * Check out these documents for more information on the device: 27 * 28 * http://www.kernel.org/doc/Documentation/devicetree/bindings/pci/host-generic-pci.txt 29 * http://www.firmware.org/1275/practice/imap/imap0_9d.pdf 30 */ 31 32 #include "qemu/osdep.h" 33 #include "qapi/error.h" 34 #include "hw/irq.h" 35 #include "hw/pci-host/gpex.h" 36 #include "migration/vmstate.h" 37 #include "qemu/module.h" 38 39 /**************************************************************************** 40 * GPEX host 41 */ 42 43 static void gpex_set_irq(void *opaque, int irq_num, int level) 44 { 45 GPEXHost *s = opaque; 46 47 qemu_set_irq(s->irq[irq_num], level); 48 } 49 50 int gpex_set_irq_num(GPEXHost *s, int index, int gsi) 51 { 52 if (index >= GPEX_NUM_IRQS) { 53 return -EINVAL; 54 } 55 56 s->irq_num[index] = gsi; 57 return 0; 58 } 59 60 static PCIINTxRoute gpex_route_intx_pin_to_irq(void *opaque, int pin) 61 { 62 PCIINTxRoute route; 63 GPEXHost *s = opaque; 64 int gsi = s->irq_num[pin]; 65 66 route.irq = gsi; 67 if (gsi < 0) { 68 route.mode = PCI_INTX_DISABLED; 69 } else { 70 route.mode = PCI_INTX_ENABLED; 71 } 72 73 return route; 74 } 75 76 static void gpex_host_realize(DeviceState *dev, Error **errp) 77 { 78 PCIHostState *pci = PCI_HOST_BRIDGE(dev); 79 GPEXHost *s = GPEX_HOST(dev); 80 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 81 PCIExpressHost *pex = PCIE_HOST_BRIDGE(dev); 82 int i; 83 84 pcie_host_mmcfg_init(pex, PCIE_MMCFG_SIZE_MAX); 85 memory_region_init(&s->io_mmio, OBJECT(s), "gpex_mmio", UINT64_MAX); 86 memory_region_init(&s->io_ioport, OBJECT(s), "gpex_ioport", 64 * 1024); 87 88 sysbus_init_mmio(sbd, &pex->mmio); 89 sysbus_init_mmio(sbd, &s->io_mmio); 90 sysbus_init_mmio(sbd, &s->io_ioport); 91 for (i = 0; i < GPEX_NUM_IRQS; i++) { 92 sysbus_init_irq(sbd, &s->irq[i]); 93 s->irq_num[i] = -1; 94 } 95 96 pci->bus = pci_register_root_bus(dev, "pcie.0", gpex_set_irq, 97 pci_swizzle_map_irq_fn, s, &s->io_mmio, 98 &s->io_ioport, 0, 4, TYPE_PCIE_BUS); 99 100 qdev_set_parent_bus(DEVICE(&s->gpex_root), BUS(pci->bus)); 101 pci_bus_set_route_irq_fn(pci->bus, gpex_route_intx_pin_to_irq); 102 qdev_init_nofail(DEVICE(&s->gpex_root)); 103 } 104 105 static const char *gpex_host_root_bus_path(PCIHostState *host_bridge, 106 PCIBus *rootbus) 107 { 108 return "0000:00"; 109 } 110 111 static void gpex_host_class_init(ObjectClass *klass, void *data) 112 { 113 DeviceClass *dc = DEVICE_CLASS(klass); 114 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass); 115 116 hc->root_bus_path = gpex_host_root_bus_path; 117 dc->realize = gpex_host_realize; 118 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 119 dc->fw_name = "pci"; 120 } 121 122 static void gpex_host_initfn(Object *obj) 123 { 124 GPEXHost *s = GPEX_HOST(obj); 125 GPEXRootState *root = &s->gpex_root; 126 127 object_initialize_child(obj, "gpex_root", root, sizeof(*root), 128 TYPE_GPEX_ROOT_DEVICE, &error_abort, NULL); 129 qdev_prop_set_int32(DEVICE(root), "addr", PCI_DEVFN(0, 0)); 130 qdev_prop_set_bit(DEVICE(root), "multifunction", false); 131 } 132 133 static const TypeInfo gpex_host_info = { 134 .name = TYPE_GPEX_HOST, 135 .parent = TYPE_PCIE_HOST_BRIDGE, 136 .instance_size = sizeof(GPEXHost), 137 .instance_init = gpex_host_initfn, 138 .class_init = gpex_host_class_init, 139 }; 140 141 /**************************************************************************** 142 * GPEX Root D0:F0 143 */ 144 145 static const VMStateDescription vmstate_gpex_root = { 146 .name = "gpex_root", 147 .version_id = 1, 148 .minimum_version_id = 1, 149 .fields = (VMStateField[]) { 150 VMSTATE_PCI_DEVICE(parent_obj, GPEXRootState), 151 VMSTATE_END_OF_LIST() 152 } 153 }; 154 155 static void gpex_root_class_init(ObjectClass *klass, void *data) 156 { 157 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 158 DeviceClass *dc = DEVICE_CLASS(klass); 159 160 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 161 dc->desc = "QEMU generic PCIe host bridge"; 162 dc->vmsd = &vmstate_gpex_root; 163 k->vendor_id = PCI_VENDOR_ID_REDHAT; 164 k->device_id = PCI_DEVICE_ID_REDHAT_PCIE_HOST; 165 k->revision = 0; 166 k->class_id = PCI_CLASS_BRIDGE_HOST; 167 /* 168 * PCI-facing part of the host bridge, not usable without the 169 * host-facing part, which can't be device_add'ed, yet. 170 */ 171 dc->user_creatable = false; 172 } 173 174 static const TypeInfo gpex_root_info = { 175 .name = TYPE_GPEX_ROOT_DEVICE, 176 .parent = TYPE_PCI_DEVICE, 177 .instance_size = sizeof(GPEXRootState), 178 .class_init = gpex_root_class_init, 179 .interfaces = (InterfaceInfo[]) { 180 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 181 { }, 182 }, 183 }; 184 185 static void gpex_register(void) 186 { 187 type_register_static(&gpex_root_info); 188 type_register_static(&gpex_host_info); 189 } 190 191 type_init(gpex_register) 192